1. Unfortunate; unlucky. He has been unhappy in his choice of a partner. Affairs have taken an unhappy turn.
2. Not happy; in a degree miserable or wretched. She is unhappy in her marriage. Children sometimes render their parents unhappy
3. Evil; calamitous; marked by infelicity; as an unhappy day.
This unhappy morn.
4. Mischievous; irregular.